Turbine-pump.



UNITED sTATEs PATENT oEEioE.

JOHN RICHARDS, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TOTURBINE'PUMP COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

TURBINE-PUIVIP.

Specification of Letters Patent.

Patented. Oct. 6, 1914.

Application filed October 17, 1901. Serial No. 78,925.

ments in these as hereinafter described and.

illustrated in drawings that form a part of this specification.

The objects of my invention are to attain` an organized construction of such pumps,

when compound or multiple acting-to vary the pressure produced without changing the speed of rotationto maintain continuous rotation of the water in the pump, and in various constructive features hereinafter particularly pointed out by the aid of the drawings in which:

Figure I is a side elevation, partially in section, of a turbine pump embodying my improvements-F ig. II -an end view of the main frame and side view of the discharge impeller chamber looking as indicated by the arrow at e in `Fig I-.Fig III is a section showing the shape of the vanes on the lines a-a in Fig. I that direct the water in its passage from one impeller to the next* Fig. IV is an enlarged section taken transversely hrough the discharge chamber, Fig.

I, showing the means for reducing the diameter of the discharge chamber, and showing n situ a portion ot a throat ring modiiedto accommodate an impeller of reduced diameter. Fig. V is a similar trans- \erse section to Fig. I V, showing the means for reducing the diameter of the discharge chamber with the ordinary throat ring n situ. Fig. VI isl a transverse section of a portion of the discharge chamber and impeller when the latter discharges diametrically into the former instead of tangentially.

The supporting frame 1 is of the usual construction arranged to receive the required number of impeller chambers 2, 3 and l that have therein the impellers 5 of like construction, provided with internal vanes 8, 9 and 10, the latter connecting to the nave as shown in Fig. II, and external vanes 12 that span or filllaterally the chambers in which the impellers revolve. The discharge chamber of the main casing 4 is annular, the annulus being substantially circular in cross section, as shown in Figs. I, IV, V, and VI. In Figs. I, IV and V said circular cross-section is modilied to admit of an arrangement of the impeller whereby it discharges tangentially into said chamber instead of directly, as in Fig. VI. The area of the annular discharge chamber is thus encroached upon to admit the wall 28, but by this modification the water is discharged i'nto the chamber with less agitation than when the throat-way is central, as in Fig. VI, and the diminished area is compensated for, while a discharge chamber of reduced diameter can be used with an impeller 'of full diameter with equal etliciency. The amount of comparative reduction in diameter is shown by comparing line A, Fig. V, with line B, Fig. VI.

rIhe impellers 5 are all keyed to Athe spindle 13, and are held against' lateral movementv by means of the screw collar or nut 14 and the inclosed distance collars 15, that fill between the vanes of the impellers, also forming in part bearingsv for the spindle 13 in the walls 7 between the impellers 5. On these walls 7 are formed the nipples.

11 that complete a smooth curved course for thewater as it approaches andenters the nozzles of the impellers 5. Besides these collars 15, the spindle 18 has bearings in the gland 17 the shell 18, on the nipples 19 of the impellers 5, in the gland 20 and in the rear bearing 22, the whole amounting in length to half ythat of the spindle 13. Of these bearings the main ones, 17 and 22, are not exposed to the water and 'can be lubricated from the cups 23. and 24, as shown in Fig, I. The pump casing consists ofthe sep 4 arable chambers 2, 3 and 4 and end covering Surrounding the impellers 5 are narrow ne many impulses and producing nearly posi tive impulsion of the water.

In operating, water enters through the suction pipe 31, passes through the pump in the direction indicated by arrows in Fig. I through passages of nearly uniform area in cross section, in easy curves producing a sigmoidal course from the inlet at 32 to the discharge chamber 37 and out at the discharge nozzle 34. In this manner the water continues in revolution after entering at 32,

i through the impellers 5, in the curved passages 35 following the vanes 36, shown in section in Fig. III from the periphery to,

the center and one impeller to the next and to the discharge chamber 37 until it meets the diverting wall or diaphragm 28 which deHect-s the water by an easy curve to the discharge nozzle 34.

When a pump of this type has to be driven at a fixed rate of revolution as in the case of being directly connected to an electric motor, the diameters of the impellers 5 have to be accurately adjusted to suit the head or resistance and the' quantity of water to be discharged. This I provide for by inserting around one or more of the impellers 5, removable rings as shown in Fig. IV where 5 is a broken section of one of the impellers reduced in diameter to receive the throat ring as shown in section above it. The portions 30 and 29 of this ring corresponds in general to the throat rings 30 in Figs. I and II except that the ledges 42 are added to lill oit the side chambers in which the vanes l2 revolve and an extension 4l is provided to fill the side of the throat above the part 30. This device when applied reduces the effective diameter of the impeller twice as much as the depth of the part 40, the vanes 29 corresponding to those with like reference in Fig. II, except being longer. Such sup# plementary throat rings can be applied around one or all of the impellers 5 and permits a ready means of adjustment in case the speed and volume is too great for an intended service. 1

As the main or discharge chamber 4 sustains the sum of the pressures produced in all the impellers Athis chamber is not made open on the outside, but is provided with double walls 43--44 with a number of ribs 45 between these Walls to stiften them, the outer wall 43 being arranged to receive the e eighty feet a second at theirl sleeve 46 which contains the packing gland 20 to prevent the escape of water, the bearing 22 not exposed to the water, a thrust bearing 47, and a removable case 48 to contain oil for the purpose of lubricating the thrust bearing 47 and the bearing 22. A. sleeve similar `to the one 46 can be applied at the other end ot the spindle instead of the gland bearing 17 and shell bearing 18, and is preferable when the length or projection of the parts is not objectionable.

It will be understood that the number of impellers employed depends on the speed and pressure to beproduced, and that these and the chambers 2 and 3 being uniform any number can be employed.

Having described the nature and objects of my invention and manner of its operation, what I claim as new and desire to secure by letters patent is:

l. In a rotary pump, an inlet way, an annular discharge chamber whose discharge annulus is approximately circular in cross section, one or more connected impeller chambers between said inlet way and said discharge chamber, and an annular throat way between the adjacent impeller chamber and Said discharge annulus, within the boundary of the circular section of the latter, tangential tothe inner Wall thereof, approximately opposite to the central line of said annulus,for1ning a continuous communication between said impeller chamber and said discharge annulus, and the adjacent impeller chamber, tangential to the ring section of the said discharge chamber, substantially as specified.

2. Ina 4rotary pump, an annular discharge chamber, the annulus being approximately circular in cross section, an annular throat way within the boundary of the circular sec tion, tangential to the inner wall of said discharge annulus, approximately opposite to the central linc of thc annulus, an impeller chamber communicating with said throat way, an impeller therein, and a partition within the area of the circular section separating said impeller chamber from said discharge annulus up to the junction of the latter with the annular throatway, substantially as specified.

3. In a rotary pump, the discharge chamber 4 provided with the Walls or webs 43 and 44, the former adapted to receive la support for the pump spindle and the latter forming in part one wall of the adjoining impeller chamber, and ribs 45 between these walls to brace them.

4. In a rotary pump, a series of similar impeller chambers detachably connected together, rotary impellers in said chambers, water passages alternating with the impellers, curved annular passages external to and leading from the impellers to said water passages, and lnipples 11 that form with the CII Cil

rais,

impeller inlets curved annular passages from the said Water 'passages to each next impeller in the series, substantially as specified.

5. in a rotary pump, a series o impeller chambers detachably connected together, a central impeller s aindle, a series of inipellers in said chambers secured on said spindle, a chambered sleeve i6, supporting the lateral one end, and having gland 2O for excluding Water, oil-bearing Q2, tlirust bearing el?, beyond eliambered sleeve i6 and removable oil ease 48, substantially. as specified.

6. In a rotary pump, an annular discharge chamber, a central impeller spindle therethrough, flanged hollow sleeve 46 secured to said discharge chamber, packing gland 2O in said holloiv sleeve, oil bearing 22, on outer extremity of sleeve 46, thrust bearing 4.7, external to oil bearing 22, and removable oil chamber 48, inclosing thrust bearing 4.117, substantially as speciied.

7. In a rotary pump, an impeller chamber, a rotary impeller therein, a discharge Way from said inipeller chamber, an annular recess between said impeller and said discharge Way, exchangeable throat rings 3G of different sizes corresponding to impellers of different diameters, said rings provided with vanes 29, extension 4l, and ledges e2, to fill the variable spaces in said annular recess when a throat ring of fitting size is inserted, substantially as specified.

8. ln a rotary pump, a series of impeller chambers detaehably connected together, rotary impellers in said chambers, Water passages alternating with the impellers, having vanes between which are return passages from one inipller to the next in the series, curied annular passages external to and leading from the impellers to said return passages, and means forming with the impeller inlets curved annular passages from the said return passages to each next impeller in the series.

9. ln a rotary pump, a series cf similar impeller chambers detachably connected together, rotary impellers in said chambers, water passages alternating with the iinpellers and having vaines providing return pasages, curved annular passages leading from the impellers to said return passages,

see

throat rings surrounding the impellers and having a series of vanes that direct the Water outward or away from the impellers, said throat ring forming a part of' the curved passages leading from the impellers to the return passages, and means forming curved annular passages from the said spiral pas sages to each nextimpeller in the series.

i0. In a rotary pump, a series of impeller chambers, rotary impellers in said chambers provided with radial discharge passages, throat rings surrounding the impellers and having a series of Vanes that direct the Water outward and away Afrom the impellers and prevent back ioiv, return passages adjacent to the impellers, each return passage connecting by a curved Way with the next sueceeding impeller, fixed vanes in said return passages, and curved annular passages external to said impellers and return passages forming communication from each impeller at its periphery to each return passage,

ll. ln a rotary pump, a series of impeller chambers, rotary impellers in said chambers provided with radial discharge passages, throat rings surrounding the impellers, return passages adjacent to the mpellers, each return passage connecting by a curved Way with the next succeeding impeller, 'neans forming said curved Way, fixed varies in said return passages, and curved annular passages external to-said impellers and forming communication through the threat ring from each impeller at its periphery to each return passage. i

l2. The combination with an impeller easing and 'its impeller chamber and throat way, oi' a throat ring having Vanes, said throat ring being formed with a narrow portion of such Width as to iit the throat Way and a ividcr portion of such Width as to ill the impeller chamber between the inipeller and throat Way, whereby an impeller or less diameter than the impeller chamber of the casing may be used.

In testimony whereof I have signed my name to this specication in the presence of two subscribing Witnesses.

JC'HN RCHARDS. l'lilitnesses W. J. LANDER, vCARR Jonns. 

